This project shows the Race Telemetry Demo Data Adapters and how they can be plugged into Lightstreamer Server and used to feed the Lightstreamer - Race Telemetry Demo - HTML Client front-end. The Race Telemetry Demo is a simple real-time telemetry application based on Lightstreamer.
The project is comprised of source code and a deployment example.
Contains the source code for the Data Adapter. The data is generated by a random feed simulator of the telemetry metrics of a car such as Time, Distance, Speed, Engine RPM, Gear, and Laps.
The Metadata Adapter functionalities are absolved by the `LiteralBasedProvider` in [Lightstreamer Java In-Process Adapter SDK](https://github.com/Lightstreamer/Lightstreamer-lib-adapter-java-inprocess#literalbasedprovider-metadata-adapter), a simple full implementation of a Metadata Adapter, already provided by Lightstreamer server.
See the source code comments for further details.
This Adapter Set is configured and will be referenced by the clients as F1Telemetry.
The adapters.xml file for the Race Telemetry Demo, should look like:
<?xml version="1.0"?>
<adapters_conf id="F1Telemetry">
<metadata_provider>
<adapter_class>com.lightstreamer.adapters.metadata.LiteralBasedProvider</adapter_class>
<param name="search_dir">.</param>
<param name="static">Y</param>
<param name="item_family_1">L_driver_1</param>
<param name="modes_for_item_family_1">DISTINCT</param>
<param name="item_family_2">P_driver_1</param>
<param name="modes_for_item_family_2">MERGE</param>
</metadata_provider>
<data_provider name="FORMULA1_ADAPTER">
<adapter_class>com.lightstreamer.examples.race_telemetry_demo.DataProviderImpl</adapter_class>
<param name="log_config_refresh_seconds">10</param>
</data_provider>
</adapters_conf>NOTE: not all configuration options of an Adapter Set are exposed by the file suggested above.
You can easily expand your configurations using the generic template, see the Java In-Process Adapter Interface Project for details.
Please refer here for more details about Lightstreamer Adapters.
If you want to install a version of the Race Telemetry Demo in your local Lightstreamer Server, follow these steps.
- Download Lightstreamer Server (Lightstreamer Server comes with a free non-expiring demo license for 20 connected users) from Lightstreamer Download page, and install it, as explained in the
GETTING_STARTED.TXTfile in the installation home directory. - Make sure that Lightstreamer Server is not running.
- Get the
deploy.zipfile of the latest release, unzip it, and copy theRaceTelemetryfolder into theadaptersfolder of your Lightstreamer Server installation. - Launch Lightstreamer Server.
- Test the Adapter, launching the Lightstreamer - Race Telemetry Demo - HTML Client listed in Clients Using This Adapter.
To build your own version of racetelemetry-adapter-java-x.y.z.jar instead of using the one provided in the deploy.zip file from the Install section above, you have two options:
either use Maven (or other build tools) to take care of dependencies and building (recommended) or gather the necessary jars yourself and build it manually.
For the sake of simplicity only the Maven case is detailed here.
You can easily build and run this application using Maven through the pom.xml file located in the root folder of this project. As an alternative, you can use an alternative build tool (e.g. Gradle, Ivy, etc.) by converting the provided pom.xml file.
Assuming Maven is installed and available in your path you can build the demo by running
mvn install dependency:copy-dependencies - Compatible with Lightstreamer SDK for Java In-Process Adapters since 7.3.
- For a version of this example compatible with Lightstreamer SDK for Java Adapters version 6.0, please refer to this tag.